Picture wont come on

50" DLP HDTV WIDESCREEN. i turn on my tv and the light comes on flashing. then the tv sounds emerge but no picture. i hear the tv changing channels but dont see anything. is there a reset button? can u help?

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Sounds like it could be the power supply. Try changing the brightness of the screen and changing picture modes like movie or standard. If this causes the flashing to change in severity, it will most likely be the power supply board

Loud sound you are hearing is coming from your color wheel and has your Lamp ever been replaced? this set has 3 Fans they all must be running for set to operate correctly! Encompass Parts has Boards and Color Wheel But for Lamps Mats has them for 99.00 1-800-628-1118 and EC Parts 1-800-638-3328

Its sounds as if the lamp has exploded or the color wheel has. I will post a link to a site that has a trouble shooting manual on CD called RCA DLP Disc #1 which covers every DLP in the ATC line which is what your model is. They have it either in cd form or they will email it. Its a very good resource for fixing your own set.http://servicemanuals.vstore.ca/